Broad spectrum UV-A, UV-B. Cellex-C Sun Care 30 provides 30 times your natural protection from the sun, blocking a very broad spectrum of harmful UV-B and UV-A rays through a combination of sunscreen and blocking agents. In addition, Cellex-C Sun Care 30 is formulated in a waterproof base, which may be applied to wet or dry skin. Excellent for swimmers, golfers, cyclists, runners and snow skiers.